Edge to Edge glass isn't unique to apple, it's not unique to Tablets. I don't know who came up with the idea to go edge to edge, but I know the concept existed before the iphone, even if a device didn't ship with it yet (though it might've)
Also, most tablets pre-ipad were Resistive Screens, not capacitive, which heavily influences design choices. Having a bezel with that kinda screen is practically a requirement.
Here's a tablet prototype idea from 1994: http://www.youtube.com/watch?v=JBEtPQDQNcI
Yes, it has a bezel. again, Resistive screen. Edge to edge glass is a new development but it's not something that's "unique" to the ipad. (side note, the video is amazing with how forward thinking that video is). It's a black thin slab, with rounded corners with a huge screen on the front.
the xoom has a totally different form factor, different screen resolution, different texture, non-unibody design, different LCD tech, but because it doesn't have a bezel it's copying the ipad?